Proper closure of your container is just as important as proper cushioning for the safety and security of your shipment.

To close a box securely, do not use masking tape, cellophane tape, duct tape, string, or paper over-wrap. Instead, use a strong tape -- two inches (5.08 cm) or more in width -- such as these types:

Pressure-sensitive plastic

Generally the easiest, most convenient tape to use

Versatile because it adheres without water and sticks to a variety of surfaces and shapes

Apply three strips to both the top and bottom flaps of the box. For regular slotted containers (RSC), where the flaps meet in the center, apply three strips of tape to both the top and bottom of the box, so the middle and two edge seams are sealed. For corrugated containers where the flaps overlap (FOL), apply three strips of tape to both the top and bottom of the box, so the three edge seams are sealed.

Nylon reinforced filament tape

Use 60 lb (27 kg) grade tape at least three inches (7.62 cm) wide

Apply three strips to both the top and bottom flaps of the box. For regular slotted containers (RSC), where the flaps meet in the center, apply three strips of tape to both the top and bottom of the box, so the middle and two edge seams are sealed. For corrugated containers where the flaps overlap (FOL), apply three strips of tape to both the top and bottom of the box, so the three edge seams are sealed.